Question

Find the 12th term of an A.P. from the last term of -2,-4,-6,...,-100​​

Answer 1

Answer:

• -78

Explanation:

Given A.P. :-

• -2, -4, -6, ...., -100.

nth term of an A.P. from the last term is given by,

→ I - (n - 1)d

We have,

• last term (I) = -100
• common difference (d) = - 4 - ( - 2) = - 2
• number of terms (n) = 12

Substitute the given values,

→ -100 - (12 - 1)*(-2)

→ - 100 - (11)(-2)

→ - 100 + 22

→ -78

∴ 12th term of the A.P. from the last term is -78.

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