Question

12)(a) If 7²n+1 = 49 = 7³, find n?
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Answer 1

If 7²n+1÷49 = 7³, find n?

7²n+1=7³×49

7²n=7³×7²-1...(Since, 7²=49)

n=(7⁵-1)/7²...(Since, 7⁵=7²+7³, 7⁵=7+7⁴)

n=7⁵/7²-1/7²

n=7³-1²/7²

n=7³-0.02

n=343-0.02

n=342.98

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