JAMB - Mathematics (1994 - No. 18)
Find the value of log10 r + log10 r2 + log10 r4 + log10 r8 + log10 r16 + log10 r32 = 63
10-1
10o
10
102
คำอธิบาย
log10 r + log10 r2 + log10 r4 + log10 r8 + log10 r16 + log10 r32 = 63
log10r63 = 63
63 = 1063
∴ r = 10
log10r63 = 63
63 = 1063
∴ r = 10