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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",5,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"LGwJD9tCiTxgKFHdkCJZwjlWIA2y4H","q","Find the values of x which satisfy the equation 16^x - 5 x 4^x + 4 = 0","ans",[414],2,"1986","course","mathematics","exp","16^x - 5 x 4^x + 4 = 0
\n
\n(4^x)² - 5(4^x) + 4 = 0
\n
\nlet 4^x = y
\n
\ny² - 5y + 4 = 0
\n
\n(y - 4)(y - 1) = 0
\n
\ny = 4 or 1
\n
\n4^x = 4
\n
\nx = 1
\n
\n4^x = 1
\n
\ni.e. 4^x = 4^o, x = 0
\n
\n∴ x = 1 or 0","opts",[422,423,424,425],"1 and 4","-2 and 2","0 and 1","-1 and 0",27,"27","initComment","initReply","actionData","errors"]

JAMB - Mathematics (1986 - No. 27)

Explanation

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