MATHEMATICS PROBLEM SOLVER

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Thursday, 8 December 2016

ARITHMETIC PROGRESSION 2

The 1st term of an A.P. is 80 and the common difference is 27. Find the 10th term.

Solution

A₁= 80, d = 27

A_n = A₁ + (n-1)d

A₁₀ = A₁ + (10-1)d

A₁₀ = A₁ + 9d

A₁₀ = 80 + (9x27) [ after substituting A₁= 80, d = 27 as given above]

∴ A₁₀ = 80 + 243

A₁₀ = 323

Hence the 10th term is 323.

TRY THIS……………

The 1st term of an A.P. is 44 and the common difference is 36. Find the 8th term.

MATHEMATICS PROBLEM SOLVER

Thursday, 8 December 2016

ARITHMETIC PROGRESSION 2

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