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Home » If 4 times the 4th term of an AP is equal to 18 times its 18th term then find its 22nd term.
If 4 times the 4th term of an AP is equal to 18 times its 18th term then find its 22nd term.
Arithmetic Progression | CBSE | Class 10 | Maths | RS Aggarwal
If 4 times the 4th term of an AP is equal to 18 times its 18th term then find its 22nd term.

Solution:

Suppose that a is the first term and d is the common difference of the AP. Then, we have:

4\times {{a}_{4}}=18\times {{a}_{18}}

Hence, the 22nd term of the AP is 0.

i

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