Question

determina numarul rational x stiind ca 1+2+3+4+.........=50 supra

2+4+6+......+100 = x supra 4


ajotor va roggggg

Answer 1

Răspuns:

1+2+3+4...=50supra

2+4+6...+100=xsupar 4

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2+4+6...+100=5100

1.numărul termenilor=>(100-2):2+1= 98:2+1=5100

2.suma=>50×(100+2)=50×102=5100

×=5100 supra 4

Formulele pe care le-am folosit

nr termenilor =(nr mare-nr mic ) :2 +1

suma=nr termenilor ×(nr mare+nr mic):2