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The first two terms of an ap are -5 and -6. It's 21st term will be the first terms of an ap are - 5 and - 6 is 21st term will be option number a350 900 number b - 315(a)315 (b)-315 |
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Answer» -25Step-by-step explanation:a = -5 .....( first term of an AP)-6 = a + (n - 1)d-6 = -5 + d .....( n=2 )d = -1t21 = a + (n-1)d = -5 + (21 - 1)(-1) = -5 - 20 = -25t21 = -25 |
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